@import url('https://fonts.googleapis.com/css?family=Open+Sans:300,400,600,700,800');

*{
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Open Sans', sans-serif;
}

body{
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    background-color: #333;
}

.container{
    position: relative;
    width: 400px;
    height: 400px;
    display: flex;
    justify-content: center;
    align-items: center;
}
.container .spinBtn{
    position: absolute;
    width: 60px;
    height: 60px;
    border-radius: 50%;
    background-color: #fff;
    z-index: 10;
    display: flex;
    justify-content: center;
    align-items: center;
    text-transform: uppercase;
    font-weight: 600;
    color: #333;
    letter-spacing: 0.1em;
    border: 4px solid rgba(0, 0, 0, 0.75);
    cursor: pointer;
    user-select: none;
}
.container .spinBtn::before{
    content: "";
    position: absolute;
    top: -20px;
    width: 20px;
    height: 30px;
    background:#fff;
    clip-path: polygon(50% 0%,15% 100%,85% 100%);
}
.container .wheel{
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: #333;
    border-radius: 50%;
    overflow: hidden;
    box-shadow:0 0 0 5px #333,
    0 0 0 15px #fff,
    0 0 0 18px #111;
    transition: transform 5s ease-in-out;
}
.container .wheel .number-container{
    position: absolute;
    width: 50%;
    height: 50%;
    background: var(--clr);
    transform-origin: bottom right;
    transform: rotate(calc(45deg * var(--i)));
    clip-path: polygon(0 0,58.5% 0, 100% 100%, 0% 58.5%);
    display: flex;
    justify-content: center;
    align-items: center;
    user-select: none;
    cursor: pointer;
}
.container .wheel .number-container span{
    position: relative;
    transform: rotate(45deg);
    font-size: 2em;
    font-weight: 700;
    color: #fff;
    text-shadow:3px 5px 2px rgba(0, 0, 0, 0.15);
}
.container .wheel .number-container span::after{
    content: "元";
    position: absolute;
    font-size: 0.75em;
    font-weight: 500;
}
